diff --git a/src/updatechecker.cpp b/src/updatechecker.cpp
deleted file mode 100644
--- a/src/updatechecker.cpp
+++ /dev/null
@@ -1,222 +0,0 @@
-/*
-  Copyright © 2018 Hasan Yavuz Özderya
-
-  This file is part of serialplot.
-
-  serialplot is free software: you can redistribute it and/or modify
-  it under the terms of the GNU General Public License as published by
-  the Free Software Foundation, either version 3 of the License, or
-  (at your option) any later version.
-
-  serialplot is distributed in the hope that it will be useful,
-  but WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  GNU General Public License for more details.
-
-  You should have received a copy of the GNU General Public License
-  along with serialplot.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include <QJsonDocument>
-#include <QJsonObject>
-#include <QJsonArray>
-#include <QJsonValue>
-#include <QRegularExpression>
-#include <algorithm>
-#include <functional>
-
-#include "updatechecker.h"
-
-// This link returns the list of downloads in JSON format. Note that we only use
-// the first page because results are sorted new to old.
-const char BB_DOWNLOADS_URL[] = "https://api.bitbucket.org/2.0/repositories/hyozd/serialplot/downloads?fields=values.name,values.links.self.href";
-
-UpdateChecker::UpdateChecker(QObject *parent) :
-    QObject(parent), nam(this)
-{
-    activeReply = NULL;
-
-    connect(&nam, &QNetworkAccessManager::finished,
-            this, &UpdateChecker::onReqFinished);
-}
-
-bool UpdateChecker::isChecking() const
-{
-    return activeReply != NULL && !activeReply->isFinished();
-}
-
-void UpdateChecker::checkUpdate()
-{
-    if (isChecking()) return;
-
-    auto req = QNetworkRequest(QUrl(BB_DOWNLOADS_URL));
-    activeReply = nam.get(req);
-}
-
-void UpdateChecker::cancelCheck()
-{
-    if (activeReply != NULL) activeReply->abort();
-}
-
-void UpdateChecker::onReqFinished(QNetworkReply* reply)
-{
-    if (reply->error() != QNetworkReply::NoError)
-    {
-        emit checkFailed(QString("Network error: ") + reply->errorString());
-    }
-    else
-    {
-        QJsonParseError error;
-        auto data = QJsonDocument::fromJson(reply->readAll(), &error);
-        if (error.error != QJsonParseError::NoError)
-        {
-            emit checkFailed(QString("JSon parsing error: ") + error.errorString());
-        }
-        else
-        {
-            QList<FileInfo> files;
-            if (!parseData(data, files))
-            {
-                // TODO: emit detailed data contents for logging
-                emit checkFailed("Data parsing error.");
-            }
-            else
-            {
-                FileInfo updateFile;
-                if (findUpdate(files, updateFile))
-                {
-                    emit checkFinished(
-                        true, updateFile.version.toString(), updateFile.link);
-                }
-                else
-                {
-                    emit checkFinished(false, "", "");
-                }
-            }
-        }
-    }
-    reply->deleteLater();
-    activeReply = NULL;
-}
-
-bool UpdateChecker::parseData(const QJsonDocument& data, QList<FileInfo>& files) const
-{
-    /* Data is expected to be in this form:
-
-    {
-       "values": [
-       {
-         "name": "serialplot-0.9.1-x86_64.AppImage",
-         "links": {
-           "self": {
-             "href": "https://api.bitbucket.org/2.0/repositories/hyOzd/serialplot/downloads/serialplot-0.9.1-x86_64.AppImage"
-            }
-          }
-       }, ... ]
-    }
-    */
-
-    if (!data.isObject()) return false;
-
-    auto values = data.object().value("values");
-    if (values == QJsonValue::Undefined || !values.isArray()) return false;
-
-    for (auto value : values.toArray())
-    {
-        if (!value.isObject()) return false;
-
-        auto name = value.toObject().value("name");
-        if (name.isUndefined() || !name.isString())
-             return false;
-
-        auto links = value.toObject().value("links");
-        if (links.isUndefined() || !links.isObject())
-            return false;
-
-        auto self = links.toObject().value("self");
-        if (self.isUndefined() || !self.isObject())
-            return false;
-
-        auto href = self.toObject().value("href");
-        if (href.isUndefined() || !href.isString())
-            return false;
-
-        FileInfo finfo;
-        finfo.name = name.toString();
-        finfo.link = href.toString();
-        finfo.hasVersion = VersionNumber::extract(name.toString(), finfo.version);
-
-        if (finfo.name.contains("amd64") ||
-            finfo.name.contains("x86_64") ||
-            finfo.name.contains("win64"))
-        {
-            finfo.arch = FileArch::amd64;
-        }
-        else if (finfo.name.contains("win32") ||
-                 finfo.name.contains("i386"))
-        {
-            finfo.arch = FileArch::_i386;
-        }
-        else
-        {
-            finfo.arch = FileArch::unknown;
-        }
-
-        files += finfo;
-    }
-
-    return true;
-}
-
-bool UpdateChecker::findUpdate(const QList<FileInfo>& files, FileInfo& foundFile) const
-{
-    QList<FileInfo> fflist;
-
-    // filter the file list according to extension and version number
-    for (int i = 0; i < files.length(); i++)
-    {
-        // file type to look
-#if defined(Q_OS_WIN)
-        const char ext[] = ".exe";
-#else  // of course linux
-        const char ext[] = ".appimage";
-#endif
-
-        // file architecture to look
-#if defined(Q_PROCESSOR_X86_64)
-        const FileArch arch = FileArch::amd64;
-#elif defined(Q_PROCESSOR_X86_32)
-        const FileArch arch = FileArch::_i386;
-#elif defined(Q_PROCESSOR_ARM)
-        const FileArch arch = FileArch::arm;
-#else
-        #error Unknown architecture for update file detection.
-#endif
-
-        // filter the file list
-        auto file = files[i];
-        if (file.name.contains(ext, Qt::CaseInsensitive) &&
-            file.arch == arch &&
-            file.hasVersion && file.version > CurrentVersion)
-        {
-            fflist += file;
-        }
-    }
-
-    // sort and find most up to date file
-    if (!fflist.empty())
-    {
-        std::sort(fflist.begin(), fflist.end(),
-                  [](const FileInfo& a, const FileInfo& b)
-                  {
-                      return a.version > b.version;
-                  });
-
-        foundFile = fflist[0];
-        return true;
-    }
-    else
-    {
-        return false;
-    }
-}